CN100397197C - Luminous tube linked protector and operation method - Google Patents
Luminous tube linked protector and operation method Download PDFInfo
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- CN100397197C CN100397197C CNB2004100382106A CN200410038210A CN100397197C CN 100397197 C CN100397197 C CN 100397197C CN B2004100382106 A CNB2004100382106 A CN B2004100382106A CN 200410038210 A CN200410038210 A CN 200410038210A CN 100397197 C CN100397197 C CN 100397197C
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Abstract
The present invention relates to a lamp tube linkage protector and an operation method thereof. The lamp tube linkage protector comprises a first lamp tube module and a second lamp tube module, wherein the first lamp tube module outputs a first judgment signal according to whether a first lamp tube is normally operated. The second lamp tube module outputs a second judgment signal according to whether a second lamp tube is normally operated. Furthermore, the first lamp tube module judges whether to supply electric energy for the first lamp tube according to the second judgment signal; the second lamp tube module decides whether to supply electric energy for the second lamp tube according to the first judgment signal. Because the present invention uses a serial signal linkage structure, the present invention can make circuits simplified. Not only is complicated system design simplified, but also the decrease of the use number of components can also reduce cost to enhance competitive advantages.
Description
Technical field
The present invention relates to a kind of fluorescent tube protective device and method of operating thereof, particularly relate to a kind of fluorescent tube interlock protective device and method of operating thereof that adopts serial.
Background technology
Because the popularization and application day by day of LCD, fluorescent tube (Fluorescent Lamp, abbreviation FL) is used in LCD (Liquid Crystal DiSplay widely, abbreviation LCD) back light system, because fluorescent tube has higher luminescence efficiency of more traditional daylight lamp and serviceable life thereof, and along with the maturation of LCD Technology and the continuous breakthrough of product quantification technique, and because LCD is constantly towards the trend of large scale development, and the application that makes many fluorescent tubes is gradually towards intelligent and complicated direction evolution.
Because the application system of many fluorescent tubes must cooperate the use of a plurality of cathode fluorescent tube controllers; therefore linking up each other and single controller architecture complexity that coordination structure just seems more original between the controller; especially the protection system not to be sneezed at especially of human safety concerns; traditional protected mode mostly adopts the defencive function of block form; it utilizes a common control line; make each system can accomplish the function of protecting simultaneously, the protection strategy of closing with back light system as a whole.
Seeing also shown in Figure 5ly, is the circuit block diagram of existing known a kind of pair of fluorescent tube protective device.In Fig. 5; this protective device comprises: first transverter (inverter) 502 and second transverter 522, first fluorescent tube 504 and second fluorescent tube 524, the first lamp current circuit for detecting 406 and the second lamp current circuit for detecting 526, the first lamp current decision circuitry 508 and the second lamp current decision circuitry 528, the first lamp current control circuit 514 and the second lamp current control circuit 534, with the door (promptly reach lock, below all become with the door) 540.Wherein, the first lamp current control circuit 510 comprises the first back coupling compensation control circuit 512 and first pulse width modulation circuit (Pulse Width Modulation is called for short PWM) 514.The second lamp current control circuit 530 comprises the second back coupling compensation control circuit 532 and second pulse width modulation circuit (Pulse Width Modulation is called for short PWM) 534.These circuit are the electric current adjustment loops that constitute fluorescent tube 504 and second fluorescent tube 524, with the operating current of stablizing the fluorescent tube 504 and second fluorescent tube 524 and the brightness of output.
In the prior art, in the design aspect protection, its be judge fluorescent tube for the operating current of detecting first fluorescent tube 504 and second fluorescent tube 524 fault whether.Therefore the first lamp current decision circuitry 508 and the second lamp current decision circuitry 528 can send respectively the first fluorescent tube shutdown command signal and the second fluorescent tube shutdown command signal extremely with door 540.Then, with 540 at door according to this two signal output signal to the first lamp current control circuits 510 and the second lamp current control circuit 540, with when arbitrary fluorescent tube breaks down, by controlling the first lamp current decision circuitry 508 and the second lamp current decision circuitry 528, and then stop supply of electrical energy and give first fluorescent tube 504 and second fluorescent tube 524.
Please then consulting shown in Figure 6ly, is the circuit block diagram of existing known a kind of three fluorescent tube protective devices.Comparison diagram 5 is with shown in Figure 6, and many 3rd transverter 642, the 3rd fluorescent tube 644, the 3rd lamp current circuit for detecting 646, the 3rd lamp current circuit 648, the 3rd lamp current control circuits 650 in Fig. 6 are with door 662 and 664.Wherein, the 3rd lamp current control circuit 650 comprises the 3rd back coupling compensation control circuit 652 and the 3rd pulse width modulation circuit 654.Wherein, the action of the three fluorescent tube protective devices of Fig. 6 is identical with the action of two fluorescent tube protective devices of Fig. 5, so do not repeat them here.
Comparison by Fig. 5 and Fig. 6 can be learnt, has increased by one group of tube circuit, then must and then increase by one with door, and, and must be coupled to each control circuit with one of them output terminal of door because each decision circuitry must be coupled to respectively and door.Therefore, with regard to the use number and circuit complexity of assembly, so get over for a long time when the fluorescent tube number, its employed component count and circuit complexity also will improve, and make cost increase.
This shows that above-mentioned existing fluorescent tube protective device and method of operating thereof obviously still have inconvenience and defective, and demand urgently further being improved in structure, method of operating and use.In order to solve the problem that fluorescent tube protective device and method of operating thereof exist; relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly; but do not see always that for a long time suitable design finished by development; and common product does not have appropriate structure to address the above problem, and this obviously is the problem that the anxious desire of relevant dealer solves.
Because above-mentioned existing fluorescent tube protective device and the existing defective of method of operating thereof; the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge; and the utilization of cooperation scientific principle; actively studied innovation; in the hope of founding a kind of fluorescent tube interlock protective device and method of operating thereof of new structure; can improve general existing fluorescent tube protective device and method of operating thereof, make it have more practicality.Through constantly research, design, and after studying sample and improvement repeatedly, create the present invention who has practical value finally.
Summary of the invention
Fundamental purpose of the present invention is; overcome the defective that existing fluorescent tube protective device exists; and a kind of fluorescent tube interlock protective device of new structure is provided; technical matters to be solved is to make its signal that utilizes serial interlock mode; make the circuit of fluorescent tube interlock protective device comparatively simplify, thereby be suitable for practicality more.
Another object of the present invention is to, a kind of fluorescent tube interlock protective device is provided, technical matters to be solved is to make its signal that utilizes serial interlock mode, can reduce the use number of assembly, and then speed that can accelerate development, thereby is suitable for practicality more.
A further object of the present invention is; a kind of fluorescent tube interlock protective device is provided; technical matters to be solved is to make its signal that utilizes serial interlock mode; control mutually; can be so that circuit still can reach arbitrary fluorescent tube after simplifying when breaking down; be about to the purpose that whole fluorescent tubes are closed, thereby be suitable for practicality more.
An also purpose of the present invention is; a kind of method of operating of fluorescent tube interlock protective device is provided; technical matters to be solved is to make its signal that utilizes serial interlock mode; can simplify the component count of circuit; make fluorescent tube interlock protective device when operation, can reduce the probability of makeing mistakes, thereby be suitable for practicality more.
The object of the invention to solve the technical problems realizes by the following technical solutions.According to a kind of fluorescent tube interlock protective device that the present invention proposes, it comprises: one first tube module, and be electrically coupled to a power supply, and comprise one first fluorescent tube, in order to whether, export one first and judge signal according to this first fluorescent tube normal running; And one second tube module, be electrically coupled to this power supply and this first tube module, and comprise one second fluorescent tube, be to receive this first judgement signal, and whether according to this second fluorescent tube normal running, judge signal in order to export one second, wherein, this first tube module receives this second judgement signal, and this first tube module is whether to give this first fluorescent tube according to this second judgement signal decision supply of electrical energy, and whether this second tube module gives this second fluorescent tube according to this first judgement signal decision supply of electrical energy.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid fluorescent tube interlock protective device, wherein said first tube module more comprises: one first converter, be electrically coupled to this power supply and this first fluorescent tube, after conversion, be supplied to this first fluorescent tube in order to the electric energy that this power supply is provided; One first detecting decision circuitry is electrically coupled to this first fluorescent tube, in order to detecting and judgement this first lamp tube current of flowing through, and exports one first detection signal and this first judgement signal; An and first control circuit, be electrically coupled to this first detecting decision circuitry and this second tube module, in order to reception and according to this first detection signal and this second judgement signal, export one first controlling signal, wherein, this first converter is whether to export electric energy according to this first controlling signal decision.
Aforesaid fluorescent tube interlock protective device, the wherein said first detecting decision circuitry comprises: one first circuit for detecting, be electrically coupled to this first fluorescent tube, detect this first lamp tube current of flowing through, to export this first detection signal; And one first decision circuitry, be electrically coupled to this first circuit for detecting, be that this first lamp tube current of flowing through is judged, first judge signal in order to export this.
Aforesaid fluorescent tube interlock protective device, wherein said first control circuit comprises one first back coupling compensating circuit and one first modulation circuit.
Aforesaid fluorescent tube interlock protective device, wherein said second tube module more comprises: one second converter, be electrically coupled to this power supply and this second fluorescent tube, after conversion, be supplied to this second fluorescent tube in order to the electric energy that this power supply is provided; One second detecting decision circuitry is electrically coupled to this second fluorescent tube, in order to detecting and judgement this second lamp tube current of flowing through, and exports one second detection signal and this second judgement signal; An and second control circuit, be electrically coupled to this second detecting decision circuitry and this first decision circuitry, in order to reception and according to this second detection signal and this first judgement signal, export one second controlling signal, wherein, this second converter is whether to export electric energy according to this second controlling signal decision.
Aforesaid fluorescent tube interlock protective device, the wherein said second detecting decision circuitry comprises: one second circuit for detecting, be electrically coupled to this second fluorescent tube, detect this second lamp tube current of flowing through, to export this second detection signal; And one second decision circuitry, be electrically coupled to this second circuit for detecting and this first control circuit, be that this second lamp tube current of flowing through is judged, second judge signal in order to export this.
Aforesaid fluorescent tube interlock protective device, wherein said second control circuit comprises one second back coupling compensating circuit and one second modulation circuit.
The object of the invention to solve the technical problems also adopts following technical scheme to realize.According to a kind of fluorescent tube interlock protective device that the present invention proposes, it comprises: one first tube module, and be electrically coupled to a power supply, and comprise one first fluorescent tube, in order to whether, export one first and judge signal according to this first fluorescent tube normal running; According to this second fluorescent tube normal running whether one second tube module is electrically coupled to this power supply and this first tube module, and comprises one second fluorescent tube, be to receive this first to judge signal, and, judge signal in order to export one second; And one the 3rd tube module, be electrically coupled to this power supply, this second tube module and this first tube module, and comprise one the 3rd fluorescent tube, be to receive this second judgement signal, and whether according to the 3rd fluorescent tube normal running, judge signal in order to export one the 3rd, wherein, this first tube module receives the 3rd and judges signal, and this first tube module is to judge according to the 3rd whether signal decision supply of electrical energy gives this first fluorescent tube, whether this second tube module gives this second fluorescent tube according to this first judgement signal decision supply of electrical energy, and whether the 3rd tube module gives the 3rd fluorescent tube according to this second judgement signal decision supply of electrical energy.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid fluorescent tube interlock protective device, wherein said first tube module more comprises: one first converter, be electrically coupled to this power supply and this first fluorescent tube, after conversion, be supplied to this first fluorescent tube in order to the electric energy that this power supply is provided; One first detecting decision circuitry is electrically coupled to this first fluorescent tube, in order to detecting and judgement this first lamp tube current of flowing through, and exports one first detection signal and this first judgement signal; An and first control circuit, be electrically coupled to this first detecting decision circuitry and the 3rd tube module, in order to receive and to judge signal according to this first detection signal and the 3rd, export one first controlling signal, wherein, this first converter is whether to export electric energy according to this first controlling signal decision.
Aforesaid fluorescent tube interlock protective device, the wherein said first detecting decision circuitry comprises: one first circuit for detecting, be electrically coupled to this first fluorescent tube, detect this first lamp tube current of flowing through, to export this first detection signal; And one first decision circuitry, be electrically coupled to this first circuit for detecting, be that this first lamp tube current of flowing through is judged, first judge signal in order to export this.
Aforesaid fluorescent tube interlock protective device, wherein said first control circuit comprises one first back coupling compensating circuit and one first modulation circuit.
Aforesaid fluorescent tube interlock protective device, wherein said second tube module more comprises: one second converter, be electrically coupled to this power supply and this second fluorescent tube, after conversion, be supplied to this second fluorescent tube in order to the electric energy that this power supply is provided; One second detecting decision circuitry is electrically coupled to this second fluorescent tube, in order to detecting and judgement this second lamp tube current of flowing through, and exports one second detection signal and this second judgement signal; An and second control circuit, be electrically coupled to this second detecting decision circuitry and this first decision circuitry, in order to reception and according to this second detection signal and this first judgement signal, export one second controlling signal, wherein, this second converter is whether to export electric energy according to this second controlling signal decision.
Aforesaid fluorescent tube interlock protective device, the wherein said second detecting decision circuitry comprises: one second circuit for detecting, be electrically coupled to this second fluorescent tube, detect this second lamp tube current of flowing through, to export this second detection signal; And one second decision circuitry, be electrically coupled to this second circuit for detecting, be that this second lamp tube current of flowing through is judged, second judge signal in order to export this.
Aforesaid fluorescent tube interlock protective device, wherein said second control circuit comprises one second back coupling compensating circuit and one second modulation circuit.
Aforesaid fluorescent tube interlock protective device, wherein said the 3rd tube module more comprises: one the 3rd converter, be electrically coupled to this power supply and the 3rd fluorescent tube, after conversion, be supplied to the 3rd fluorescent tube in order to the electric energy that this power supply is provided; One the 3rd detecting decision circuitry is electrically coupled to the 3rd fluorescent tube, in order to detecting and judgement the 3rd lamp tube current of flowing through, and exports one the 3rd detection signal and the 3rd judgement signal; And one the 3rd control circuit, be electrically coupled to the 3rd detecting decision circuitry and this second decision circuitry, in order to reception and according to the 3rd detection signal and this second judgement signal, export one the 3rd controlling signal, wherein, the 3rd converter is that whether decision exports electric energy according to the 3rd controlling signal.
Aforesaid fluorescent tube interlock protective device, wherein said the 3rd control circuit comprises one the 3rd back coupling compensating circuit and one the 3rd modulation circuit.
The object of the invention to solve the technical problems also realizes by the following technical solutions.The method of operating of a kind of fluorescent tube interlock protective device that proposes according to the present invention, this fluorescent tube interlock protective device comprises one first fluorescent tube and one second fluorescent tube, this method of operating may further comprise the steps: detect flow through this first fluorescent tube and this second lamp tube current respectively; The result judges according to detecting, judges signal and one second judgement signal to export one first; According to this first judgement signal, whether the decision supply of electrical energy gives this second fluorescent tube; And according to this second judgement signal, whether the decision supply of electrical energy gives this first fluorescent tube.
The object of the invention to solve the technical problems realizes by the following technical solutions again.The method of operating of a kind of fluorescent tube interlock protective device that proposes according to the present invention, this fluorescent tube interlock protective device comprises one first fluorescent tube, one second fluorescent tube and one the 3rd fluorescent tube, and this method of operating may further comprise the steps: detect flow through this first fluorescent tube, this second fluorescent tube and the 3rd lamp tube current respectively; The result judges according to detecting, judges signal, one second judgement signal and one the 3rd judgement signal to export one first; According to this first judgement signal, whether the decision supply of electrical energy gives this second fluorescent tube; And according to this second judgement signal, whether the decision supply of electrical energy gives the 3rd fluorescent tube; And according to the 3rd judgement signal, whether the decision supply of electrical energy gives this first fluorescent tube.
The present invention compared with prior art has tangible advantage and beneficial effect.By above technical scheme as can be known, in order to reach aforementioned goal of the invention, major technique of the present invention thes contents are as follows:
The present invention proposes a kind of fluorescent tube interlock protective device, and this fluorescent tube interlock protective device comprises: first tube module and second tube module.Above-mentioned first tube module is electrically coupled to power supply, and comprises first fluorescent tube, and it is according to the whether normal running of first fluorescent tube, judges signal to export first.Above-mentioned second tube module is electrically coupled to the power supply and first tube module, and comprises second fluorescent tube, receives first and judges signal, and according to the whether normal running of second fluorescent tube, judge signal to export second.Wherein, first tube module is to receive second to judge signal, and first tube module is to judge according to second signal determines whether supply of electrical energy is given first fluorescent tube, and second tube module judges that according to first signal determines whether supply of electrical energy is to second fluorescent tube.
The present invention reintroduces a kind of fluorescent tube interlock protective device, and this fluorescent tube interlock protective device comprises first tube module and second tube module.Above-mentioned first tube module is electrically coupled to power supply, and comprises first fluorescent tube, and it is according to the whether normal running of first fluorescent tube, judges signal to export first.Above-mentioned second tube module is electrically coupled to the power supply and first tube module, and comprises second fluorescent tube, and it is to receive first to judge signal, and according to the whether normal running of second fluorescent tube, judges signal to export second.Above-mentioned the 3rd tube module is electrically coupled to power supply, second tube module and first tube module, and comprises the 3rd fluorescent tube, is to receive second to judge signal, and according to the whether normal running of the 3rd fluorescent tube, judges signal to export the 3rd.Wherein, first tube module receives the 3rd and judges signal, and first tube module is to judge that according to the 3rd signal determines whether supply of electrical energy is given first fluorescent tube, second tube module judges according to first signal determines whether supply of electrical energy is given second fluorescent tube, and the 3rd tube module judges that according to second signal determines whether supply of electrical energy is given the 3rd fluorescent tube.
The present invention also proposes a kind of method of operating of fluorescent tube interlock protective device, and this fluorescent tube interlock protective device comprises first fluorescent tube and second fluorescent tube.This method of operating, it comprises: when the running of fluorescent tube interlock protective device, detect flow through first fluorescent tube and second lamp tube current respectively, judge according to the detecting result then, judge signal to export the first judgement signal and second.Secondly,, determine whether supply of electrical energy is given second fluorescent tube, and, determine whether supply of electrical energy is given first fluorescent tube according to the second judgement signal according to the first judgement signal.
The present invention proposes a kind of method of operating of fluorescent tube interlock protective device in addition, this fluorescent tube interlock protective device, and it comprises first fluorescent tube, second fluorescent tube and the 3rd fluorescent tube.This method of operating, it comprises: when the running of fluorescent tube interlock protective device, detect flow through first fluorescent tube, second fluorescent tube and the 3rd lamp tube current respectively.Secondly, the result judges according to detecting, judges signal, the second judgement signal and the 3rd judgement signal to export first.Then, judge signal according to first, whether determine supply of electrical energy to give this second fluorescent tube, judge signal according to second, whether determine supply of electrical energy to give the 3rd fluorescent tube and judge signal according to the 3rd, determine whether supply of electrical energy is given first fluorescent tube.
Therefore the present invention can make circuit comparatively simplify because adopt the signal linkage structure of serial, has not only simplified complicated system design, and the minimizing of assembly use number, can also reduce cost to improve competitive edge.
Via as can be known above-mentioned, the invention relates to a kind of fluorescent tube interlock protective device and method of operating thereof.This fluorescent tube interlock protective device, it comprises: first tube module and second tube module.This first tube module is according to the whether normal running of first fluorescent tube, and signal is judged in output first.This second tube module is according to the whether normal running of second fluorescent tube, and signal is judged in output second.And first tube module is for judging according to second signal determines whether supply of electrical energy is given first fluorescent tube, and second tube module judges that according to first signal determines whether supply of electrical energy is given second fluorescent tube.
By technique scheme, fluorescent tube interlock protective device of the present invention and method of operating thereof have following advantage at least:
1, fluorescent tube of the present invention interlock protective device and method of operating thereof are to utilize structural design simplifying complicated system design, thereby are suitable for practicality more.
2, fluorescent tube interlock protective device of the present invention and method of operating thereof can reduce the use number of assembly, and can reach the competitive edge that reduces cost.
3, fluorescent tube interlock protective device of the present invention and method of operating thereof are the protection structures arranged side by side of the existing known product of improvement, and adopt the signal linkage structure of serial, and circuit is comparatively simplified.
4, fluorescent tube interlock protective device of the present invention and method of operating thereof can make the design of integrated circuit comparatively simplify.
5, fluorescent tube interlock protective device of the present invention and method of operating thereof can make the side circuit plate be easier to make.
In sum, fluorescent tube of the present invention interlock protective device utilizes the signal interlock mode of serial, makes the circuit of fluorescent tube interlock protective device comparatively simplify; In addition it utilizes the signal interlock mode of serial, can reduce the use number of assembly, and then speed that can accelerate development; Moreover it utilizes the signal interlock mode of serial, and control mutually can be about to the purpose that whole fluorescent tubes are closed so that circuit still can reach arbitrary fluorescent tube after simplifying when breaking down.The method of operating of fluorescent tube of the present invention interlock protective device is utilized the signal interlock mode of serial, can simplify the component count of circuit, makes fluorescent tube interlock protective device can reduce the probability of makeing mistakes when operation.It has above-mentioned many advantages and practical value thereof; and in like product and method, do not see have similar structural design and method to publish or use and really genus innovation; no matter it all has bigger improvement on product structure, method or function; have large improvement technically; and produced handy and practical effect; and more existing fluorescent tube protective device and method of operating thereof have the multinomial effect of enhancement; thereby be suitable for practicality more; and have the extensive value of industry, really be a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of instructions, below with preferred embodiment of the present invention and conjunction with figs. describe in detail as after.
Description of drawings
Figure 1A is the circuit block diagram according to a kind of pair of fluorescent tube interlock protective device of a preferred embodiment of the present invention.
Figure 1B is the flow chart of steps according to the method for operating of a kind of pair of fluorescent tube interlock protective device of a preferred embodiment of the present invention.
Fig. 2 A is the circuit block diagram according to a kind of three fluorescent tubes interlock protective device of a preferred embodiment of the present invention.
Fig. 2 B is the flow chart of steps according to the method for operating of a kind of three fluorescent tubes interlock protective device of a preferred embodiment of the present invention.
Fig. 3 A is the sequential chart according to a kind of pair of fluorescent tube interlock protective device of a preferred embodiment of the present invention.
Fig. 3 B is the sequential chart according to a kind of three fluorescent tubes interlock protective device of a preferred embodiment of the present invention.
Fig. 4 is the practical circuit diagram according to a kind of pair of fluorescent tube interlock protective device of a preferred embodiment of the present invention.
Fig. 5 is the circuit block diagram that has a kind of pair of known fluorescent tube protective device now.
Fig. 6 is the circuit block diagram that has known a kind of three fluorescent tube protective devices now.
10,20: fluorescent tube interlock protective device 40,42: tube module
102: the first converters of 100: the first tube module
104: the first fluorescent tubes detecting in 106: the first decision circuitry
108: 110: the first circuit for detecting of first control circuit
112: the first decision circuitry back coupling in 114: the first compensating circuit
142: the second converters of 116: the first modulation circuits
144: the second fluorescent tubes detecting in 146: the second decision circuitry
148: 150: the second circuit for detecting of second control circuit
152: the second decision circuitry back coupling in 154: the second compensating circuit
272: the three converters of 156: the second modulation circuits
274: the three fluorescent tubes detecting in 276: the three decision circuitry
280: the three circuit for detecting of 278: the three control circuits
282: the three decision circuitry back coupling in 284: the three compensating circuit
302: the first fluorescent tube faults of 286: the three modulation circuits origination point
306: the first lamp current waveforms of 304: the first light tube electric voltage waveforms
Fluorescent tube was judged 310: the second light tube electric voltage waveforms of signal in 308: the first
314: the second fluorescent tubes of 312: the second lamp current waveforms are judged signal
334: the first light tube electric voltage waveforms of 332: the first fluorescent tube fault origination points
338: the first fluorescent tubes of 336: the first lamp current waveforms are judged signal
342: the second lamp current waveforms of 340: the second light tube electric voltage waveforms
Fluorescent tube was judged 346: the three light tube electric voltage waveforms of signal in 344: the second
350: the three fluorescent tubes of 348: the three lamp current waveforms are judged signal
402,442: converter 404,444: fluorescent tube
406,446: detecting decision circuitry 408,448: control circuit
410,450: circuit for detecting 412,452: decision circuitry
414,454: back coupling compensating circuit 416,456: modulation circuit
418,458: latch circuit 420,460,540: with door (and lock)
504: the first fluorescent tubes of 502: the first transverters
508: the first lamp current decision circuitry of 506: the first lamp current circuit for detecting
510: the first lamp current control circuits back coupling in 512: the first compensation control circuit
522: the second transverters of 514: the first pulse width modulation circuits
526: the second lamp current circuit for detecting of 524: the second fluorescent tubes
530: the second lamp current control circuits of 528: the second lamp current decision circuitry
534: the second pulse width modulation circuits of 532: the second back coupling compensation control circuits
644: the three fluorescent tubes of 642: the three transverters
648: the three lamp current decision circuitry of 646: the three lamp current circuit for detecting
650: the three lamp current control circuits back coupling in 652: the three compensation control circuit
Pulse width modulation circuit 662,664 in 654: the three: with door (and lock)
S102～S116: steps flow chart S202～S222: steps flow chart
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention; below in conjunction with accompanying drawing and preferred embodiment; to fluorescent tube interlock protective device and its embodiment of method of operating, structure, method, step, feature and the effect thereof that foundation the present invention proposes, describe in detail as after.
Seeing also shown in Figure 1A, is the circuit block diagram according to a kind of pair of fluorescent tube interlock protective device of a preferred embodiment of the present invention.In the present embodiment; this pair fluorescent tube interlock protective device 100 comprises first tube module 100 and second tube module 140; and this first tube module 100 and second tube module 140 all are coupled to a power supply, and first tube module 100 and second tube module 140 are exported first respectively and judged the signal and the second judgement signal.
In this example, this first tube module 100, it comprises first converter 102, first fluorescent tube 104, first detecting decision circuitry 106 and the first control circuit 108.Wherein, this first converter 102 is electrically coupled to the power supply and first fluorescent tube 104, and it is that the electric energy that power supply provides is supplied with first fluorescent tube 104 after changing.The first detecting decision circuitry 106 is electrically coupled to fluorescent tube, is responsible for detecting and judges the electric current of first fluorescent tube 104 of flowing through, and export first detection signal and first and judge signal.First control circuit 108 is electrically coupled to the first detecting decision circuitry 106, to receive and to judge signal according to second of first detection signal and 140 outputs of second tube module, to export first controlling signal.Wherein, first converter 102 is that whether decision exports electric energy according to first controlling signal.
In the present embodiment, this second tube module 140 comprises second converter 142, second fluorescent tube 144, second detecting decision circuitry 146 and the second control circuit 148.And the action of these circuit in this second tube module 140 is identical with first tube module 100 with function, so do not repeat them here.
In the present embodiment, this first circuit for detecting 106 comprises first circuit for detecting 110 and first decision circuitry 112.Wherein, first circuit for detecting 110 is electrically coupled to first fluorescent tube 104, and it is an electric current of detecting first fluorescent tube 104 of flowing through, to export first detection signal.And first decision circuitry 112 is electrically coupled to first circuit for detecting 106, and it is that the electric current of first fluorescent tube 104 of flowing through is judged, judges signal to export first.In addition, the detecting of second in second tube module 140 decision circuitry 146 also comprises second circuit for detecting 150 and second decision circuitry 152, and its action is identical with first decision circuitry 112 with first circuit for detecting 110, so repeat no more equally.
In the present embodiment, the invention is characterized in that first decision circuitry 112 of first tube module 100 is to be electrically coupled to first control circuit 148, and second decision circuitry 152 of second tube module 140 is to be electrically coupled to first control circuit 108.
Please consult simultaneously shown in Figure 1A and Figure 1B, Figure 1B is the flow chart of steps according to the method for operating of a kind of pair of fluorescent tube interlock protective device of a preferred embodiment of the present invention.In the present embodiment, after first tube module 100 and second tube module 140 are enabled, 142 of first converter 102 and second converters receive the electric energy that it is supplied from power supply respectively, and after changing output first fluorescent tube 104 and the required electric energy of second fluorescent tube 144.
Secondly, after first fluorescent tube 104 and second fluorescent tube 144 are started working, first circuit for detecting 110 and 150 of second circuit for detecting also begin to detect the electric current of first fluorescent tube 104 and second fluorescent tube 144 of flowing through, and export first detection signal and second detection signal (S102) respectively.152 of first decision circuitry 112 and second decision circuitry are judged according to the detecting result then, and export first respectively and judge the signal and the second judgement signal (S104).
In the present embodiment, the second judgement signal that first detection signal that its first control circuit 108 receptions first circuit for detecting 110 transmits and second decision circuitry 152 transmit, the first judgement signal that second detection signal that its second control circuit 148 receptions second circuit for detecting 150 transmits and first decision circuitry 112 transmit.Then, 108 of its first control circuits judge that according to the first received detection signal and second signal does computing, and export first controlling signal to the first converter 102, and whether supply of electrical energy is given first fluorescent tube 104 (S106) to control.Second control circuit 148 is then done computing according to the second received detection signal and the first judgement signal, and exports second controlling signal to the second converter 142, and whether supply of electrical energy is given second fluorescent tube 144 (S108) to control.
When then first converter, 102 normal operations (S110) are learnt when wanting supply of electrical energy to give first fluorescent tube 104 in judgement; Otherwise when judgement learnt that supply of electrical energy is not given first fluorescent tube 104,102 of first converters for example were decommission (S112).Same as above, when then second converter, 142 normal operations (S114) are learnt when wanting supply of electrical energy to give second fluorescent tube 144 in judgement; Otherwise when judgement learnt that supply of electrical energy is not given second fluorescent tube 144,142 of second converters for example were decommission (S116).
Seeing also shown in Fig. 3 A, is the sequential chart according to a kind of pair of fluorescent tube interlock protective device of the present invention's one preferred embodiments.In the present embodiment, when for example being that first fluorescent tube 102 is when the first fluorescent tube fault origination point 302 breaks down, still can continue on first fluorescent tube 102 has output voltage (waveform 304), but first fluorescent tube 102 will not have electric current flows through (waveform 306), therefore start first fluorescent tube, 102 shutdown command signals 308 (for example being the judgement signal of judging in the time of to close), this shutdown command signal is through the delay of a short time, can remove to close the control circuit 148 of second fluorescent tube 144, make second fluorescent tube 144 no longer include electric current (waveform 312) and voltage (waveform 310), therefore can start second fluorescent tube, 144 shutdown command signals 314.This shutdown command signal can go to close first control circuit 108 through the delay of a short time, thereby makes the voltage signal (waveform 304) of first fluorescent tube 104 reduce to zero.
Seeing also shown in Fig. 2 A, is the circuit block diagram according to a kind of three fluorescent tubes interlock protective device of a preferred embodiment of the present invention.The different part of Fig. 2 A and Figure 1A is, one the 3rd tube module 270 that Fig. 2 A is many, and it also comprises the 3rd converter 272, the 3rd fluorescent tube 274, the 3rd detecting decision circuitry 276 and the 3rd control circuit 278.And the action of the 3rd tube module 270 is identical with second tube module 140 with first tube module 100, so repeat no more.
In the present embodiment, Fig. 2 A and Figure 1A difference are, first decision circuitry 112 of Fig. 2 A is electrically coupled to 152 of second control circuit 148, the second decision circuitry and is electrically coupled to 282 of the 3rd control circuit 278, the three decision circuitry and is electrically coupled to first control circuit 116.
Please consult simultaneously shown in Fig. 2 A and Fig. 2 B, Fig. 2 B is the flow chart of steps according to the method for operating of a kind of three fluorescent tubes interlock protective device of the present invention's one preferred embodiments.In this example, after first tube module 100, second tube module 140 and the 3rd tube module 270 are enabled, first converter 102, second converter 142 and the 3rd converter 272, then receive the electric energy that it is supplied from power supply respectively, and after changing output first fluorescent tube 104, second fluorescent tube 144 and the required electric energy of the 3rd fluorescent tube 274.
Secondly, after first fluorescent tube 104, second fluorescent tube 144 and the 3rd fluorescent tube 274 are started working, first circuit for detecting 110, second circuit for detecting 150 and 280 of the 3rd circuit for detecting also begin to detect the electric current of first fluorescent tube 104, second fluorescent tube 144 the 3rd fluorescent tube 274 of flowing through, and export first detection signal, second detection signal and the 3rd detection signal (S202) respectively.282 of first decision circuitry 112, second decision circuitry 152 and the 3rd decision circuitry are judged according to the detecting result then, and export first respectively and judge that signal, second judges signal and the 3rd judgement signal (S204).
In the present embodiment, the 3rd judgement signal that first detection signal that first control circuit 108 receptions first circuit for detecting 110 transmits and the 3rd decision circuitry 282 transmit, the first judgement signal that second detection signal that second control circuit 148 receptions second circuit for detecting 150 transmits and first decision circuitry 112 transmit, the second judgement signal that the 3rd detection signal that the 3rd control circuit 278 receptions the 3rd circuit for detecting 280 transmits and second decision circuitry 152 transmit.Then, 108 of first control circuits judge that according to the first received detection signal and the 3rd signal does computing, and export first controlling signal to the first converter 102, and whether supply of electrical energy is given first fluorescent tube 104 (S206) to control.Second control circuit 148 is then done computing according to the second received detection signal and the first judgement signal, and exports second controlling signal to the second converter 142, and whether supply of electrical energy is given second fluorescent tube 144 (S208) to control.278 of the 3rd control circuits judge that according to the 3rd received detection signal and second signal does computing, and export the 3rd controlling signal to the three converters 272, and whether supply of electrical energy is given the 3rd fluorescent tube 274 (S210) to control
When then converter 102 normal operations (S212) are learnt when wanting supply of electrical energy to give first fluorescent tube 104 in judgement; Otherwise, when judgement learns that not supply of electrical energy is given first fluorescent tube 104,102 of first converters decommission (S214).With the above, when then second converter, 142 normal operations (S220) are learnt when wanting supply of electrical energy to give second fluorescent tube 144 in judgement; Otherwise when judgement learnt that supply of electrical energy is not given second fluorescent tube 144,142 of second converters for example were decommission (S222).Same as above, when then the 3rd converter 272 normal operations (S216) are learnt when wanting supply of electrical energy to give the 3rd fluorescent tube 274 in judgement; Otherwise when judgement learnt that supply of electrical energy is not given the 3rd fluorescent tube 274,272 of the 3rd converters for example were decommission (S218).
Seeing also shown in Fig. 3 B, is the sequential chart according to a kind of three fluorescent tubes interlock protective device of the present invention's one preferred embodiments.In this example, when for example being that first fluorescent tube 102 is when the first fluorescent tube fault origination point 332 breaks down, still can continue on first fluorescent tube 102 has output voltage (waveform 334), but first fluorescent tube 102 will not have electric current flows through (waveform 336), therefore start first fluorescent tube, 102 shutdown command signals 338 (for example being the judgement signal of judging in the time of to close), this shutdown command signal is through the delay of a short time, can remove to close the control circuit 148 of second fluorescent tube 144, and make second fluorescent tube 144 no longer include electric current (waveform 342) and voltage (waveform 340), therefore can start second fluorescent tube, 144 shutdown command signals 3344.This shutdown command signal can remove to close the control circuit 278 of the 3rd fluorescent tube 274 through the delay of a short time, makes the 3rd fluorescent tube 274 no longer include electric current (waveform 348) and voltage (waveform 346), therefore can start the 3rd fluorescent tube 274 shutdown command signals 350.This judgement signal can go to close first control circuit 108, and make the voltage signal (waveform 350) of first fluorescent tube 104 reduce to zero through the delay of a short time.
Please then consulting shown in Figure 4ly, is the practical circuit diagram according to a kind of pair of fluorescent tube interlock protective device of a preferred embodiment of the present invention.And Fig. 4 only is for realizing one of them example of circuit of the present invention, actually from ought be not as limit.In Fig. 4, this pair fluorescent tube interlock protective device comprises tube module 40 and 42.This tube module 40, can for example be comprise converter 402, fluorescent tube 404, circuit for detecting 410, decision circuitry 412, latch circuit 418, control circuit 408, feedback compensating circuit 414, modulation circuit 416 and with door 420.And this tube module 42, then can for example be comprise converter 442, fluorescent tube 444, circuit for detecting 450, decision circuitry 452, latch circuit 458, control circuit 448, feedback compensating circuit 454, modulation circuit 456 and with door 460.
Wherein, the delay of short time can for example be 20mS, but not as limit.
In preferred embodiment of the present invention, as be familiar with this skill person and can know easily, converter can be transverter (inverter), and fluorescent tube can be to use the fluorescent tube (Fluorescent Lamp is called for short FL) in LCD, but all not as limit.
In preferred embodiments of the present invention, as be familiar with this skill person and can know easily, control circuit can for example be to comprise that back coupling compensating circuit and pulse width modulation circuit (Pulse WidthModulation is called for short PWM) come the control transformation device, are sent to the watt level of fluorescent tube with control.
In preferred embodiment of the present invention, as be familiar with this skill person and can know easily, the present invention is not limited to have only two fluorescent tubes or three fluorescent tubes, and it also can use technical characterictic of the present invention--and utilize the connected mode of ring-type transmission line, apply the present invention in the system of many fluorescent tubes.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the method that can utilize above-mentioned announcement and technology contents are made a little change or be modified to the equivalent embodiment of equivalent variations, but every content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (19)
1. fluorescent tube interlock protective device is characterized in that it comprises:
According to this first fluorescent tube normal running whether one first tube module is electrically coupled to a power supply, and comprises one first fluorescent tube, with, export one first and judge signal; And
One second tube module is electrically coupled to this power supply and this first tube module, and comprises one second fluorescent tube, and receive this and first judge signal, and according to this second fluorescent tube normal running whether, judge signal in order to export one second,
Wherein, this first tube module receives this second judgement signal, and this first tube module is whether to give this first fluorescent tube according to this second judgement signal decision supply of electrical energy, and whether this second tube module gives this second fluorescent tube according to this first judgement signal decision supply of electrical energy.
2. fluorescent tube interlock protective device according to claim 1 is characterized in that wherein said first tube module more comprises:
One first converter is electrically coupled to this power supply and this first fluorescent tube, is supplied to this first fluorescent tube in order to the electric energy that this power supply is provided after conversion;
One first detecting decision circuitry is electrically coupled to this first fluorescent tube, in order to detecting and judgement this first lamp tube current of flowing through, and exports one first detection signal and this first judgement signal; And
One first control circuit is electrically coupled to this first detecting decision circuitry and this second tube module, in order to reception and according to this first detection signal and this second judgement signal, exports one first controlling signal,
Wherein, this first converter is whether to export electric energy according to this first controlling signal decision.
3. fluorescent tube interlock protective device according to claim 2 is characterized in that the wherein said first detecting decision circuitry comprises:
One first circuit for detecting is electrically coupled to this first fluorescent tube, detects this first lamp tube current of flowing through, in order to export this first detection signal; And
One first decision circuitry is electrically coupled to this first circuit for detecting, is this first lamp tube current of flowing through is judged, in order to export this first judgement signal.
4. fluorescent tube interlock protective device according to claim 3 is characterized in that wherein said first control circuit comprises one first back coupling compensating circuit and one first modulation circuit.
5. fluorescent tube interlock protective device according to claim 4 is characterized in that wherein said second tube module more comprises:
One second converter is electrically coupled to this power supply and this second fluorescent tube, is supplied to this second fluorescent tube in order to the electric energy that this power supply is provided after conversion;
One second detecting decision circuitry is electrically coupled to this second fluorescent tube, in order to detecting and judgement this second lamp tube current of flowing through, and exports one second detection signal and this second judgement signal; And
One second control circuit, it is electrically coupled to this second detecting decision circuitry and this first decision circuitry, in order to reception and according to this second detection signal and this first judgement signal, exports one second controlling signal,
Wherein, this second converter is whether to export electric energy according to this second controlling signal decision.
6. fluorescent tube interlock protective device according to claim 5 is characterized in that the wherein said second detecting decision circuitry comprises:
One second circuit for detecting is electrically coupled to this second fluorescent tube, detects this second lamp tube current of flowing through, in order to export this second detection signal; And
One second decision circuitry is electrically coupled to this second circuit for detecting and this first control circuit, is this second lamp tube current of flowing through is judged, in order to export this second judgement signal.
7. fluorescent tube interlock protective device according to claim 6 is characterized in that wherein said second control circuit comprises one second back coupling compensating circuit and one second modulation circuit.
8. fluorescent tube interlock protective device is characterized in that it comprises:
According to this first fluorescent tube normal running whether one first tube module is electrically coupled to a power supply, and comprises one first fluorescent tube, in order to, export one first and judge signal;
According to this second fluorescent tube normal running whether one second tube module is electrically coupled to this power supply and this first tube module, and comprises one second fluorescent tube, be to receive this first to judge signal, and, judge signal in order to export one second; And
One the 3rd tube module is electrically coupled to this power supply, this second tube module and this first tube module, and comprises one the 3rd fluorescent tube, and be to receive this second to judge signal, and according to the 3rd fluorescent tube normal running whether, judge signal in order to export one the 3rd,
Wherein, this first tube module receives the 3rd and judges signal, and this first tube module is to judge according to the 3rd whether signal decision supply of electrical energy gives this first fluorescent tube, whether this second tube module gives this second fluorescent tube according to this first judgement signal decision supply of electrical energy, and whether the 3rd tube module gives the 3rd fluorescent tube according to this second judgement signal decision supply of electrical energy.
9. fluorescent tube interlock protective device according to claim 8 is characterized in that wherein said first tube module more comprises:
One first converter is electrically coupled to this power supply and this first fluorescent tube, is supplied to this first fluorescent tube in order to the electric energy that this power supply is provided after conversion;
One first detecting decision circuitry is electrically coupled to this first fluorescent tube, in order to detecting and judgement this first lamp tube current of flowing through, and exports one first detection signal and this first judgement signal; And
One first control circuit is electrically coupled to this first detecting decision circuitry and the 3rd tube module, in order to receive and to judge signal according to this first detection signal and the 3rd, exports one first controlling signal,
Wherein, this first converter is whether to export electric energy according to this first controlling signal decision.
10. fluorescent tube interlock protective device according to claim 9 is characterized in that the wherein said first detecting decision circuitry comprises:
One first circuit for detecting is electrically coupled to this first fluorescent tube, detects this first lamp tube current of flowing through, in order to export this first detection signal; And
One first decision circuitry is electrically coupled to this first circuit for detecting, is this first lamp tube current of flowing through is judged, in order to export this first judgement signal.
11. fluorescent tube interlock protective device according to claim 10 is characterized in that wherein said first control circuit comprises one first back coupling compensating circuit and one first modulation circuit.
12. fluorescent tube interlock protective device according to claim 11 is characterized in that wherein said second tube module more comprises:
One second converter is electrically coupled to this power supply and this second fluorescent tube, is supplied to this second fluorescent tube in order to the electric energy that this power supply is provided after conversion;
One second detecting decision circuitry is electrically coupled to this second fluorescent tube, in order to detecting and judgement this second lamp tube current of flowing through, and exports one second detection signal and this second judgement signal; And
One second control circuit, it is electrically coupled to this second detecting decision circuitry and this first decision circuitry, in order to reception and according to this second detection signal and this first judgement signal, exports one second controlling signal,
Wherein, this second converter is whether to export electric energy according to this second controlling signal decision.
13. fluorescent tube interlock protective device according to claim 12 is characterized in that the wherein said second detecting decision circuitry comprises:
One second circuit for detecting is electrically coupled to this second fluorescent tube, detects this second lamp tube current of flowing through, in order to export this second detection signal; And
One second decision circuitry is electrically coupled to this second circuit for detecting, is this second lamp tube current of flowing through is judged, in order to export this second judgement signal.
14. fluorescent tube interlock protective device according to claim 13 is characterized in that wherein said this second control circuit comprises one second back coupling compensating circuit and one second modulation circuit.
15. fluorescent tube interlock protective device according to claim 14 is characterized in that wherein said the 3rd tube module more comprises:
One the 3rd converter is electrically coupled to this power supply and the 3rd fluorescent tube, is supplied to the 3rd fluorescent tube in order to the electric energy that this power supply is provided after conversion;
One the 3rd detecting decision circuitry is electrically coupled to the 3rd fluorescent tube, in order to detecting and judgement the 3rd lamp tube current of flowing through, and exports one the 3rd detection signal and the 3rd judgement signal; And
One the 3rd control circuit, it is electrically coupled to the 3rd detecting decision circuitry and this second decision circuitry, in order to reception and according to the 3rd detection signal and this second judgement signal, exports one the 3rd controlling signal,
Wherein, the 3rd converter is that whether decision exports electric energy according to the 3rd controlling signal.
16. fluorescent tube interlock protective device according to claim 15 is characterized in that wherein said the 3rd detecting decision circuitry comprises:
One the 3rd circuit for detecting is electrically coupled to the 3rd fluorescent tube, detects the 3rd lamp tube current of flowing through, in order to export the 3rd detection signal; And
One the 3rd decision circuitry is electrically coupled to the 3rd circuit for detecting and this first control circuit, is that the 3rd lamp tube current of flowing through is judged, judges signal in order to export the 3rd.
17. fluorescent tube interlock protective device according to claim 16 is characterized in that wherein said the 3rd control circuit comprises one the 3rd back coupling compensating circuit and one the 3rd modulation circuit.
18. the method for operating of a fluorescent tube interlock protective device is applied on the LCD, this fluorescent tube interlock protective device comprises one first fluorescent tube and one second fluorescent tube, it is characterized in that this method of operating may further comprise the steps:
Detect flow through this first fluorescent tube and this second lamp tube current respectively;
The result judges according to detecting, judges signal and one second judgement signal to export one first;
According to this first judgement signal, whether the decision supply of electrical energy gives this second fluorescent tube; And
According to this second judgement signal, whether the decision supply of electrical energy gives this first fluorescent tube.
19. the method for operating of a fluorescent tube interlock protective device is applied on the LCD, this fluorescent tube interlock protective device comprises one first fluorescent tube, one second fluorescent tube and one the 3rd fluorescent tube, it is characterized in that this method of operating may further comprise the steps:
Detect flow through this first fluorescent tube, this second fluorescent tube and the 3rd lamp tube current respectively;
The result judges according to detecting, judges signal, one second judgement signal and one the 3rd judgement signal to export one first;
According to this first judgement signal, whether the decision supply of electrical energy gives this second fluorescent tube; And
According to this second judgement signal, whether the decision supply of electrical energy gives the 3rd fluorescent tube; And
According to the 3rd judgement signal, whether the decision supply of electrical energy gives this first fluorescent tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100382106A CN100397197C (en) | 2004-05-13 | 2004-05-13 | Luminous tube linked protector and operation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100382106A CN100397197C (en) | 2004-05-13 | 2004-05-13 | Luminous tube linked protector and operation method |
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| Publication Number | Publication Date |
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| CN1696798A CN1696798A (en) | 2005-11-16 |
| CN100397197C true CN100397197C (en) | 2008-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100382106A Expired - Fee Related CN100397197C (en) | 2004-05-13 | 2004-05-13 | Luminous tube linked protector and operation method |
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|---|---|---|---|---|
| JPH08213184A (en) * | 1995-02-09 | 1996-08-20 | Hitachi Ltd | Discharge lamp lighting device and liquid crystal backlight using the device |
| JPH10161083A (en) * | 1996-11-27 | 1998-06-19 | Sony Corp | Back light driving device for liquid crystal display panel |
| US6515431B2 (en) * | 2001-02-05 | 2003-02-04 | Yin Nan Enterprises Co., Ltd. | Multi-lamp protection circuit for an electronic ballast |
| US6583570B1 (en) * | 1999-09-10 | 2003-06-24 | Koito Manufacturing Co., Ltd. | Discharge lamp device for vehicle |
| JP2003217875A (en) * | 2002-01-18 | 2003-07-31 | Eye Lighting Syst Corp | Lighting device for two-lamp type flickerless discharge lamp |
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2004
- 2004-05-13 CN CNB2004100382106A patent/CN100397197C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08213184A (en) * | 1995-02-09 | 1996-08-20 | Hitachi Ltd | Discharge lamp lighting device and liquid crystal backlight using the device |
| JPH10161083A (en) * | 1996-11-27 | 1998-06-19 | Sony Corp | Back light driving device for liquid crystal display panel |
| US6583570B1 (en) * | 1999-09-10 | 2003-06-24 | Koito Manufacturing Co., Ltd. | Discharge lamp device for vehicle |
| US6515431B2 (en) * | 2001-02-05 | 2003-02-04 | Yin Nan Enterprises Co., Ltd. | Multi-lamp protection circuit for an electronic ballast |
| JP2003217875A (en) * | 2002-01-18 | 2003-07-31 | Eye Lighting Syst Corp | Lighting device for two-lamp type flickerless discharge lamp |
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| CN1696798A (en) | 2005-11-16 |
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